For the third edition of the Mad Marathon (Maffe Marathon), the goal was to get customers to engage with the products that de Bijenkorf offers during this annual sales event, before the event actually starts. Gaining new Facebook fans and realising downloads of the booklets with offers were secundairy goals. To achieve this, the game 'The Mad List' (de Maffe Lijst) was created, where players create a list of products they desire from the booklets, then battle over them. This created a game that people played for a long period, sharing their victories on Facebook creating a viral effect.